单项选择题

The problem of environment protection has been studied______.

A．extremely
B．intensively
C．originally
D．violently
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单项选择题
We all hope he'll soon______ his disappointment and be happy again.
A．get through
B．get away
C．get up
D．get down
单项选择题
You'd better tell me beforehand if______ go with me.
A．you'll rather not
B．you won't rather
C．you'd rather not
D．you'd rather not to
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